KEK High Energy Accelerator Research Organization ILC Status

KEK High Energy Accelerator Research Organization ILC Status in Japan October 26, 2018 LCWS 2018, University of Texas Arlington KEK M. Yamauchi 1

KEK Procedure to go forward High Energy Accelerator Research Organization n MEXT procedure (standard procedure) June 19 July 4 Physics working group ILC Advisory Panel TDR working group Decision by MEXT Opinion of SCJ n Political process ILC Federation of Diet Members recognizes that the positive sign has to be given by the end of this year, and strong action is being taken to secure budget.

KEK ILC Advisory Panel at MEXT High Energy Accelerator Research Organization MEXT ILC Advisory Panel Research contract May 2014 ~ Survey of technological spin-offs, research trends and technical feasibility Working groups under the ILC Advisory Panel Particle and Nuclear Physics June 2014 ~ TDR Validation June 2014 ~ Human Resources Nov. 2015 ~ Organization and Management Feb. 2017 ~ The Particle and Nuclear Physics WG and TDR Validation WG were reactivated to discuss the ILC 250 proposal. n The reports from the two WG’s were received by the ILC Advisory Panel on June 19. n The final report from the panel was released on July 4. n 3

KEK Report from the working groups at MEXT High Energy Accelerator Research Organization n Physics working group Precise measurements of Higgs couplings to the other particles will provide knowledge of the nature of new physics, which will indicate future direction of particle physics. Precise measurements of top quark cannot be done at the 250 Ge. V ILC. Triple Higgs coupling cannot be measured, either. For searches for dark matter and extra dimension, the ILC still remains useful even with 250 Ge. V. Taking all these discussions into account, the purpose of the 250 Ge. V ILC is understood as: It clarifies the direction toward the new physics beyond the Standard Model and its energy scale from the pattern of deviation from the Standard Model in the coupling strengths of Higgs and other particles. n TDR validation working group Cost of the 250 Ge. V ILC based on the estimation by LCC/KEK (all the numbers are in unit of 108 JPY ~ US$0. 9 M) ü ü ü Accelerator (+ civil const. + labor) 6350 - 7028 Detector (+ labor) 1005 Annual operation cost 366 - 392 Preparation phase 233 Others: 25% uncertainty, 10% contingency, decommission=2 x annual operation etc. Technical issues still remain in beam dump, positron source, beam control and injection system of the damping ring. They have to be cleared in the preparation phase.

KEK High Energy Accelerator Research Organization Report from the ILC Advisory Panel n The ILC advisory panel of MEXT has finished its discussion in July 2018, and released a report “Summary of the ILC Advisory Panel's Discussions to Date after Revision”. (http: //www. mext. go. jp/component/b_menu/shingi/toushin/__ics. Files/af ieldfile/2018/09/20/1409220_2_1. pdf) n The report reviews the ILC project in detail. Scientific potentials Cost and technical feasibility Human resources educational program Organization and management International cooperation Discussion of the 250 Ge. V ILC n All these points are reviewed with positive flavor in the report, but it does NOT give any recommendation. n It requests the Science Council of Japan to discuss the 250 Ge. V ILC, based on the evaluation given in the panel report.

KEK High Energy Accelerator Research Organization ILC review panel at SCJ n Intensive reviews are being made by the Review Panel and the Technology Subpanel. The review panel is chaired by Dr. Iye, condensed matter physicist who chaired the previous ILC committee in 2013. n 8 Review Panel meetings in 2. 5 months: Aug. 10 (J), Aug. 21, Aug. 29, Sep. 11 (closed meeting), Sep. 18 (J), Oct. 10 (J, partially closed meeting) and Oct. 16 (J, partially closed meeting) J: Joint meeting with the subpanel Physics at ILC 250 (Keisuke Fujii), ILC 250 accelerator (Shin Michizono), LCB statement (Tatsuya Nakada), Report from the working groups at MEXT , ILC organization described at ILC-PIP (MY), Future plan of KEK and ILC (MY), Consensus on ILC at the Japanese HEP community (Hiroaki Aihara). . . Summary of the discussions was released on Sep. 18. ü Strategy of research in case deviation from the Standard Model is not observed in Higgs decays ü Is precision measurements of Higgs really the most important topics in particle physics? ü Is ILC an attractive research infrastructure 20 years later? ü Is there a consensus in the Japanese HEP community? ü Has KEK discussed its future program and priorities in detail? 6

KEK High Energy Accelerator Research Organization ILC review panel at SCJ – Technology Subpanel n Another series of intensive reviews are being made by the Technology Subpanel. The subpanel consists of experts of civil engineering, environmental science, accelerator (light source) etc. n 8 Subpanel meetings in 2. 5 months: Aug. 10 (J), Aug. 20, Aug. 23, Sep. 18 (J), Oct. 2, Oct. 10 (J, partially closed meeting) and Oct. 16 (J, partially closed meeting) J: Joint meeting with the panel Shin Michizono, Akira Yamamoto, Masanobu Miyahara, Kaoru Yokoya, Nobuhiro Terunuma et al. answered many questions from the subpanel (including nasty ones). We received support letters from you, which were useful to convince the panel members that our claim is endorsed by the international community. I am sure the Txas Statement will have a similar effect. n The SCJ understand well that their conclusion has to be released before the end of 2018. n 7

Cou r Liberal Democratic Party S. 政策横断で国家プロジェクトとして実現を目指して Yam tesy ash ita Coordination Council for Realization of ILC Unified HQ for Implementing Regional Revitalization Head: Hon. Takeo KAWAMURA HQ for Promoting National Land Resilience Research Council for Strategy on Science, Technology and Innovation Head: Hon. Toshihiro NIKAI Chair: Hon. Kisaburo TOKAI HQ for Accelerating Reconstruction from Great East Japan Earthquake Head: Hon. Fukushiro NUKAGA Liberal Democratic Party Coordination Council for Realization of ILC (Representative: Hon. Takeo KAWAMURA) （Across-party group) Science and Technology Group Chair: Hon. Hiroyuki HOSODA Knowledgeable Advisors Advanced Accelerator Assoc. Promoting Science and Technology Chair: Mr. Takashi NISHIOKA ILC 100 People Committee Hon. Hiroya MASUDA (former Minister for Internal Affairs) Prof. Satoshi FUJII (Counselor, Cabinet Secretariat) Prof. Atsushi SUNAMI (Vice President, GRIPS) Tohoku ILC Promotion Council Representative: Mr. Hiroaki TAKAHASHI, Prof. Hideo OHNO ILC Supporters Research Council for Strategy on Intellectual Property Chair: Hon. Akira AMARI (Across-party group) Federation of Diet Members in Support of ILC Chair: Hon. Takeo KAWAMURA Secretary General: Hon. Ryu SHIONOYA

KEK High Energy Accelerator Research Organization Resolution by the ILC Coordination Council September 18, 2018 n To position ILC as a cross-policy “national project”, covering not only science, technology and innovation but also many challenges faced by the national government; n To secure the financial resources for the realization of ILC (beyond the Olympic Games) outside the ordinary science and technology, academic or university budgets; and in addition, n To make sure that, as for the international agreement of ILC, certain critical decisions, such as the share of oversea investments be roughly half, be satisfied before the international agreement necessary for the start of construction of ILC is reached. 9

ILC Promotion bodies in Japan: Parliamentary cabinet system National Diet (Parliament) Representatives ~480 Councillors ~240 Political Federation of the Diet Members for ILC (2006, 2008~) Founded by LDP in 2006 Multiparties in 2008. Now ~150 Members Industry & Academia Business sector AAA Advanced Accelerator Association (2008~) (2014~ incorporated company) Industry-Academia cooperation Led by Executives of Leading Companies and KEK DG Local Area Candidate area ILC Tohoku Promotion Office (2016, June~) Government Co S. Y urtesy ama shit a Cabinet (Prime Minister’s office) Ministries MEXT (Education, Culture, Sports, S&T) CAO (Cabinet office) – S&T Council (CSTI) MOFA (Foreign Affairs) -- Embassy MLIT (Civil, Sightseeing, Transport) METI (Economy, Trade, Industry) +… MOF (Ministry of Finance) Central activity in Researchers KEK, JAEA, QST, JAXA, RIKEN, SCJ Science Council of Japan KEK ILC Promotion Office Universities (led by KEK DG, 2014~) , , J-HEP Committee Technological leadership for Accelerator Cooperation with MEXT Japan HEP Community Led by Local Governments, Business Associations, Univ. Presidents. Cooperation of Civil engineering at candidate site area Geological surveys, preparation for campus

KEK High Energy Accelerator Research Organization Visit from US DOE n Hon. Paul Dabbar, Under Secretary for Science, US DOE, visited Japan at the beginning of October. n He visited KEK to talk with us on the various accelerator project, and ILC. n He also visited the meeting of the Coordination Council for the Realization of ILC in Liberal Democratic Party, and expressed strong interest in the ILC, and said that he would act as a positive advocator in US government and congress provided the Japanese government makes the decision. n This meeting was an excellent occasion to share strong motivations for the ILC between US and Japan. 11

KEK High Energy Accelerator Research Organization MEXT discussed ILC with European Governments n A group of MEXT officials led by Deputy Director of Research Promotion Bureau, MEXT, had a video meeting with French MESRI on March 16. n “Given the results of LHC, feeling among researchers in France is that 500 Ge. V ILC will not be able to find signs of new physics beyond Standard Model. 250 Ge. V ILC now has a certain scientific merit, because it can make clear precision measurements of the Higgs particle. In general, it is necessary to balance cost of the project with its expected scientific outcome. ” n “For the large research infrastructure, MESRI has its own decision making process, based on the prioritization given by the domestic scientific community. Possible French contribution to ILC will have to be considered in this process. ”

KEK High Energy Accelerator Research Organization MEXT discussed ILC with European Governments n A group of MEXT officials led by Deputy Director of Research Promotion Bureau, MEXT, had a video meeting with German BMBF on May 9. n “German researchers have scientific interests in the ILC project, however there is a prudent opinion that the change from 500 Ge. V to 250 Ge. V will restrict the project’s capability, and that it is, therefore, questionable whether it will really open up the way to new physics. ” n “It is a problem that in past cases, the initial cost estimate of a large-scale project often turned out to be quite different from the actual cost, causing unexpected additional cost. In addition, professional project management based on past experience and know-how is required to commission and operate such a large scale project. ” n “For the large research infrastructure, German Government has its own decision making process, based on the prioritization given by the domestic scientific community. Possible German contribution to ILC will have to be considered in this process. ”

KEK High Energy Accelerator Research Organization Summary and conclusions n The ILC proposal is being intensively studied by the ILC Panel at the Science Council of Japan. KEK and Japanese HEP community are making all the possible reactions to the questions given by the Panels, so that the ILC is correctly understood by them. n We anticipate that a report will be given by the Panel in ~ a month. n Japanese Politicians organized the ILC Coordination Council, which published a resolution and push the project strongly. n Statement from the Japanese government is expected by the end of 2018. Outcome from the SCJ + Result of the political efforts = Governmental statement from Japan.